ok that's cool just find a FWD Lego tranny and it should all bolt in easily (compared to my 76 wagon lol) cause of that adapter stuff is futile when you are using it on road unlike some of the guys on the usmb

yeah I used to know the owner of that RX too lol that was a one off thing that the bell housing was investment casted and a custom flywheel was made for it to make it work, but I must say a EJ swap would be cool and is simple to do too